Antagonistic Mono- and Bi-Articular Lower-Limb Muscle Activities’ Model Characterization at Different SpeedsM.A.M Dzahir, N.S.M Nor, A. Azaman, M. Hussein and M.A. Mat DzahirMATEC Web Conf., 135 (2017) 00065DOI: https://doi.org/10.1051/matecconf/201713500065